86 citations · 275 across the 14 of their papers we have counts for
14 papers · 1 filter
Output tracking based on extended observer for nonlinear uncertain systems
Xinhua Wang, Zengqiang Chen, Zhuzhi Yuan
A high-gain extended observer is designed for a class of nonlinear uncertain systems. This observer has the ability of estimating system uncertainty, and it can be used to estimate…
Signal corrector and decoupling estimations for UAV control
Xinhua Wang
For a class of uncertain systems with large-error sensing, the low-order stable signal corrector and observer are presented for signal correction and uncertainty estimation accordi…
Modeling and control of an agile tail-sitter aircraft
Xinhua Wang, Zengqiang Chen, Zhuzhi Yuan
This paper presents a model of an agile tail-sitter aircraft, which can operate as a helicopter as well as capable of transition to fixed-wing flight. Aerodynamics of the co-axial…
Frequency-domain analysis of nonlinear and linear integrators
Xinhua Wang
In this paper, frequency-domain analysis based on frequency sweep method is presented for a nonlinear double integrator and a new linear integrator. All the two types of integrator…
Mathematical modeling and control of a tilt-rotor aircraft
Xinhua Wang, Lilong Cai
This paper presents a novel model of large-size tilt-rotor aircraft, which can operate as a helicopter as well as being capable of transition to fixed-wing flight. Aerodynamics of…
Aircraft navigation based on differentiation-integration observer
Xinhua Wang, Lilong Cai
In this paper, a generalized differentiation-integration observer is presented based on sensors selection. The proposed differentiation-integration observer can estimate the multip…
Nonlinear continuous integral-derivative observer
Xinhua Wang, Bijan Shirinzadeh
In this paper, a high-order nonlinear continuous integral-derivative observer is presented based on finite-time stability and singular perturbation technique. The proposed integral…
Design and analysis of continuous hybrid differentiator
Xinhua Wang, Hai Lin
In this paper, a continuous hybrid differentiator is presented based on a strong Lyapunov function. The differentiator design can not only reduce sufficiently chattering phenomenon…
Design and frequency analysis of continuous finite-time-convergent differentiator
Xinhua Wang, Hai Lin
In this paper, a continuous finite-time-convergent differentiator is presented based on a strong Lyapunov function. The continuous differentiator can reduce chattering phenomenon s…
Two-step differentiator for delayed signal
Xinhua Wang, Hai Lin
This paper presents a high-order differentiator for delayed measurement signal. The proposed differentiator not only can correct the delay in signal, but aslo can estimate the unde…
Universal approximation using differentiators and application to feedback control
Xinhua Wang
In this paper, we consider the problems of approximating uncertainties and feedback control for a class of nonlinear systems without full-known states, and two approximation method…
High-order integral-chain differentiator and application to acceleration feedback
Xinhua Wang
The equivalence between integral-chain differentiator and usual high-gain differentiator is given under suitable coordinate transformation. Integral-chain differentiator can restra…
Frequency characteristics based on describing function method for differentiators
Xinhua Wang
In this paper, describing function method is used to analyze the characteristics and parameters selection of differentiators. Nonlinear differentiator is an effective compensation…
Rapid-convergent nonlinear differentiator
Xinhua Wang, Bijan Shirinzadeh
A nonlinear differentiator being fit for rapid convergence is presented, which is based on singular perturbation technique. The differentiator design can not only sufficiently redu…